Capacity Control for Refrigeration and Air-Conditioning Systems: A Comparative Study

摘要

The capacity control of a vapor-compression refrigeration system is investigated for three different capacity control schemes. In a hot-gas by-pass control scheme, the refrigerant is by-passed from the compressor and injected back into the suction line to decrease the cooling capacity, whereas in cylinder - unlading scheme, one or more cylinders are un- loaded to decrease the refrigerant mass flow rate in the system, which decreases the cooling capacity.